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Fish Lake thistle
Scientific Name: Cirsium clavatum
Family: Asteraceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Fish Lake Thistle (Cirsium clavatum)
Cirsium clavatum, commonly known as Fish Lake Thistle, is a species belonging to the Asteraceae family.
Taxonomy and Nomenclature
- Scientific Name: Cirsium clavatum (M.E. Jones) Petr.
- Family: Asteraceae (Aster Family)
- Synonyms/Varieties:
- Cirsium clavatum var. americanum (A. Gray) D.J. Keil – Rocky Mountain Thistle
Distribution and Habitat
- Fish Lake Thistle is known to be found in Utah and western Colorado.
- Cirsium clavatum var. americanum is found in eastern Colorado.
Morphological Characteristics
- Cirsium clavatum is similar to C. eatonii but lacks joining hairs on the involucre bracts.
Ecological Role
- Cirsium arvense (Canada Thistle) and C. vulgare (Bull Thistle) are mentioned in the context of Fish Lake, suggesting different thistle species can co-exist in similar environments.
- European Marsh Thistle (unspecified scientific name in provided text) can form dense stands that affect shoreline access.
- Pitcher's Thistle faces new threats in Great Lakes sand dunes.
Related Species
- Cirsium ciliolatum (Ashland Thistle)
- Cirsium clokeyi (Whitespine Thistle)
- Cirsium pitcheri (Pitcher's Thistle/Dune Thistle/Wooly Leaved Thistle)
- Cirsium arvense (Canada Thistle)
- Cirsium vulgare (Bull Thistle)
- Cirsium fontinale var. obispoense (Chorro Creek bog thistle)
Further Information
- Discover Life: Has a page dedicated to the biology, natural history, ecology, identification, and distribution of Cirsium clavatum.
- U.S. Fish & Wildlife Service: Source of information related to Pitcher's thistle.